碩士 / 國立高雄海洋科技大學 / 漁業生產與管理研究所 / 105 / Seasonal variation of catch composition and the relationship between fishing condition and lunar phase of the gillnet fisheries were examined in this study for the coastal waters off Hsinchu, northwestern Taiwan, based on the related fishing data (including vessel name, tonnage, operating date, fishing gear, fishes and catches), sea surface water temperature and chlorophyll a concentration’s information from January to December 2015.
The fishing activities of gillnet fisheries (including surface gillnets and bottom gillnets) in Hsinchu area were throughout the year, and its main fishing period was between October and March. The catches of the gillnet fisheries around the Hsinchu fishing ground was mostly from the surface gillnets, accounting for 85.58 percent. The migratory species coming with the China Coastal Water were the main catch of the gillnet fisheries, so that the fishing conditions was better during the period of low surface water temperature. A total of 137 species were recorded during the survey period, including 119 species of fish, 4 species of mollusk, 10 species of crab and 4 species of shrimps. The first 10 relatively important species were Mugil cephalus, Ilisha elongata, Johnius distinctus, Pennahia argentata, Sepia esculenta, Siganus fuscescens, Chrysochir aureus, Pomadasys kaakan, Aluterus monoceros, especially the M. cephalus catches accounted for 44.77% of the total catch. For the relationship between catch rate and lunar phase, the results showed that the catch rates of surface gillnet and bottom gillnet were not significantly affected by the lunar phase in this study.
| Identifer | oai:union.ndltd.org:TW/105NKIM0451005 |
| Date | January 2017 |
| Creators | Lo,Sheng-Feng, 羅盛鋒 |
| Contributors | Chiou,Wann-Duen, 邱萬敦 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 90 |
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